Mandibular Intraoral Anatomy Flashcards
what is a symphysis
in infants it is a radiolucent line through the midline of the jaw between the images of the forming deciduous central icisors
what are the genial tubercles
they are bony protuberances located on the lingual surface of the mandible slightly above the inferior border and in the midline
what is the lingual foramen
a foramen on the lingual surface of the midline of the mandible in the region of the genial tubercles
how many lingual foramen are there
usually one but often two or even more
what is the mental ridge
on PA radiographs of the mandibular central incisors the mental ridge may occasionally be seen as two radiopaque lines sweeping bilaterally forward and upward toward the midline
what is the mental fossa
a depression on the labial aspect of the mandible extending laterally from the midline and above the mental ridge near the premolars
what is usually the anterior limit of the inferior dental canal
the mental foramen
what does the mandibular canal look like
a dark linear shadow with thin radiopaque superior and inferior borders
what are nutrient canals
nutrient canals carry a neurovascular bundle and appear as radiolucent lines of fairly uniform width inside trabecular bone
decscribe the internal oblique ridge and what is it also called
a slightly irregular crest of bone on the lingual surface of the mandibular body
- also called mylohyoid ridge
describe the submandibular gland fossa
a depression of the bone on the lingual surface of the mandibular body immediately below the internal oblique ridge in the molar area
describe the external oblique ridge
a continuation of the anterior border of the mandibular ramus
describe the inferior border of the mandible
occasionally the inferior mandibular border is seen on periapical projections as a characteristically dense, broad radiopaque band of bone
describe the coronoid process
the image of the coronoid process is triangular radiopacity, with its apex directed superiorly and anteriorly superimposed on the region of the third molar
what are mandibular tori
- bony outgrowths on the lingual surface of the mandible
-often bilateral and symmetrical
